#include <bits/stdc++.h>

using namespace std;
int main() {
    int m;
    while(cin>>m){
        if(m==0)break;
		long long a,b;
        cin>>a>>b;
        a+=b;
		if(a==0){
			cout<<0<<endl;
			continue;
		}
        string s;
        while(a!=0){
            s.push_back(a%m+'0');
            a/=m;
        }
        reverse(s.begin(),s.end());
        cout<<s<<endl;
    }
}